--- product_id: 28966691 title: "630-0204 2\" SmartFasten Tank to Bowl Kit (Black)" brand: "mansfield" price: "¥4109" currency: JPY in_stock: true reviews_count: 8 category: "Mansfield" url: https://www.desertcart.jp/products/28966691-630-0204-2-smartfasten-tank-to-bowl-kit-black store_origin: JP region: Japan --- # 3 patent-pending SmartFasten bolts Hassle-free bolt locking design Rust-resistant rubber bolt heads 630-0204 2" SmartFasten Tank to Bowl Kit (Black) **Brand:** mansfield **Price:** ¥4109 **Availability:** ✅ In Stock ## Summary > 🚽 Upgrade your throne with zero leaks and max ease! ## Quick Answers - **What is this?** 630-0204 2" SmartFasten Tank to Bowl Kit (Black) by mansfield - **How much does it cost?** ¥4109 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/28966691-630-0204-2-smartfasten-tank-to-bowl-kit-black) ## Best For - mansfield enthusiasts ## Why This Product - Trusted mansfield brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Precision Fit:** Specifically engineered for 2" flush valve Mansfield toilets. - • **All-in-One Kit:** Includes gasket, bolts, and nuts for a seamless setup. - • **Cleaner, Faster Setup:** No washers required thanks to molded rubber seals. - • **Rust-Proof Durability:** Rubber bolt heads keep metal dry and corrosion-free. - • **Effortless Installation:** SmartFasten bolts lock in place—no awkward tank reach needed. ## Overview The Mansfield 630-0204 2" SmartFasten Tank to Bowl Kit is a professional-grade plumbing solution designed for quick, secure installation on Mansfield toilets with 2" flush valves. Featuring patent-pending bolts that lock in place without needing to reach inside the tank, molded rubber seals that eliminate washers, and rust-resistant bolt heads, this kit ensures a durable, leak-free connection that saves time and hassle for both pros and DIYers. ## Description Upgrade your toilet repair experience with the Mansfield 630-0204 2" SmartFasten Tank to Bowl Kit - a hassle-free solution designed for durability and easy installation. Whether you're a professional plumber or a DIYer, this kit makes tank-to-bowl installation simpler, cleaner, and more reliable. What's Included: - 1x 2" Tank-to-Bowl Gasket (fits 2" flush valves) - 3x Patent-Pending SmartFasten Bolts) - 3x Nuts) SmartFasten Technology Features: - Hassle Free Installation – The SmartFasten bolt design locks in place, eliminating the need to reach inside the tank when tightening nuts. - Washer Free – Each bolt includes a pre-molded rubber seal, eliminating the need for separate washers and simplifying setup. - Rust Free – With a rubber-headed bolt, water never touches metal—preventing rust and extending the life of your installation. Please Note: This kit is for 2" flush valve systems. While the 2" and 3" versions of the SmartFasten kit look similar, the only difference is the size of the gasket. Be sure to match the gasket size to your flush valve size to ensure proper fit and function. Perfect For: - Toilet repairs and upgrades - Mansfield toilet models using a 2" flush valve - Professionals and DIYers looking for a quick, clean, rust-resistant solution Make toilet maintenance easier than ever with the Mansfield 630-0204 2" SmartFasten Kit—designed to save time, prevent leaks, and eliminate common frustrations. Review: Doesn't leak. Easy to install - There is nothing fancy or special about this, but it works without leaks and that is certainly the most important thing with this purchase. Fit my Mansfield toilet without any issue. I did not have difficulty chasing the bolts or gasket out. Review: Yes, this works! Easy install with no leaks. - Great easy to install for your Mansfield toilet rebuild! I did an internal rebuild on my original 26-year old Mansfield toilet. I used a Flowmaster all in one kit but substituted the tank to bowl screws with these because the other screws are more difficult to install and have had leaking issues in the past. These were easy to install and no special wrenches needed for tightening. Just hand tighten and maintain so it’s level and away from the wall so lid fits as it should. I went ahead and bought another set so I’m ready when doing the same project on my upstairs bathroom. ## Features - Mansfield 630-0204 Complete Kit Includes: 2" tank-to-bowl gasket, three patent-pending SmartFasten bolts, and three nuts – everything needed for a secure installation. - Hassle-Free Installation: Unique bolt design locks into place, so you never have to reach inside the tank to hold the bolt while tightening. - No Washers Needed: Each bolt comes with a molded rubber seal—no separate washers required, making installation quicker and cleaner. - Rust-Free Design: Rubber bolt heads prevent water from contacting metal, eliminating rust and increasing long-term durability. - 2" Gasket for Flush Valve Compatibility: Specifically designed for toilets with a 2" flush valve. Note: 2" and 3" versions appear similar—ensure correct gasket size for your flush valve. - Fits Many Mansfield Toilets: Engineered to work with a wide range of Mansfield models that use a 2" flush valve system. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0113O78SS | | Best Sellers Rank | #33,170 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #5 in Toilet Floor Bolts & Washer Sets | | Brand | Mansfield | | Brand Name | Mansfield | | Color | Black | | Connector Type | Coupling | | Customer Reviews | 4.5 out of 5 stars 949 Reviews | | Exterior Finish | Black | | Manufacturer | Mansfield | | Manufacturer Part Number | 630-0204 | | Material | Multi | | Material Type | Multi | | Model Number | 630-0204 | | Number of Packs | 1 | | Number of Pieces | 7 | | Set Name | Mansfield 2" SmartFasten Tank to Bowl Kit | | Size | 2 Inch | | Thread Size | 2 inch | | Thread Type | NPTF | | UPC | 040003110047 | | Unit Count | 1 count | ## Product Details - **Brand:** Mansfield - **Color:** Black - **Connector Type:** Coupling - **Exterior Finish:** Black - **Item Weight:** 0.01 Ounces - **Material:** Multi - **Number of Pieces:** 7 - **Size:** 2 Inch - **Thread Size:** 2 inch - **Thread Type:** NPTF ## Images ![630-0204 2" SmartFasten Tank to Bowl Kit (Black) - Image 1](https://m.media-amazon.com/images/I/61rMiF2+iFL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Doesn't leak. Easy to install *by M***E on August 8, 2026* There is nothing fancy or special about this, but it works without leaks and that is certainly the most important thing with this purchase. Fit my Mansfield toilet without any issue. I did not have difficulty chasing the bolts or gasket out. ### ⭐⭐⭐⭐⭐ Yes, this works! Easy install with no leaks. *by L***K on May 10, 2026* Great easy to install for your Mansfield toilet rebuild! I did an internal rebuild on my original 26-year old Mansfield toilet. I used a Flowmaster all in one kit but substituted the tank to bowl screws with these because the other screws are more difficult to install and have had leaking issues in the past. These were easy to install and no special wrenches needed for tightening. Just hand tighten and maintain so it’s level and away from the wall so lid fits as it should. I went ahead and bought another set so I’m ready when doing the same project on my upstairs bathroom. ### ⭐⭐⭐⭐⭐ Perfect fit, easy install. *by B***1 on December 7, 2025* OEM fit and quality made the job easier. No leaks at all. --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.jp/products/28966691-630-0204-2-smartfasten-tank-to-bowl-kit-black](https://www.desertcart.jp/products/28966691-630-0204-2-smartfasten-tank-to-bowl-kit-black) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-08-31*